/*
* IBM eServer eHCA Infiniband device driver for Linux on POWER
*
* QP functions
*
* Authors: Joachim Fenkes <fenkes@de.ibm.com>
* Stefan Roscher <stefan.roscher@de.ibm.com>
* Waleri Fomin <fomin@de.ibm.com>
* Hoang-Nam Nguyen <hnguyen@de.ibm.com>
* Reinhard Ernst <rernst@de.ibm.com>
* Heiko J Schick <schickhj@de.ibm.com>
*
* Copyright (c) 2005 IBM Corporation
*
* All rights reserved.
*
* This source code is distributed under a dual license of GPL v2.0 and OpenIB
* BSD.
*
* OpenIB BSD License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/slab.h>
#include "ehca_classes.h"
#include "ehca_tools.h"
#include "ehca_qes.h"
#include "ehca_iverbs.h"
#include "hcp_if.h"
#include "hipz_fns.h"
static struct kmem_cache *qp_cache;
/*
* attributes not supported by query qp
*/
#define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_ACCESS_FLAGS | \
IB_QP_EN_SQD_ASYNC_NOTIFY)
/*
* ehca (internal) qp state values
*/
enum ehca_qp_state {
EHCA_QPS_RESET = 1,
EHCA_QPS_INIT = 2,
EHCA_QPS_RTR = 3,
EHCA_QPS_RTS = 5,
EHCA_QPS_SQD = 6,
EHCA_QPS_SQE = 8,
EHCA_QPS_ERR = 128
};
/*
* qp state transitions as defined by IB Arch Rel 1.1 page 431
*/
enum ib_qp_statetrans {
IB_QPST_ANY2RESET,
IB_QPST_ANY2ERR,
IB_QPST_RESET2INIT,
IB_QPST_INIT2RTR,
IB_QPST_INIT2INIT,
IB_QPST_RTR2RTS,
IB_QPST_RTS2SQD,
IB_QPST_RTS2RTS,
IB_QPST_SQD2RTS,
IB_QPST_SQE2RTS,
IB_QPST_SQD2SQD,
IB_QPST_MAX /* nr of transitions, this must be last!!! */
};
/*
* ib2ehca_qp_state maps IB to ehca qp_state
* returns ehca qp state corresponding to given ib qp state
*/
static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
{
switch (ib_qp_state) {
case IB_QPS_RESET:
return EHCA_QPS_RESET;
case IB_QPS_INIT:
return EHCA_QPS_INIT;
case IB_QPS_RTR:
return EHCA_QPS_RTR;
case IB_QPS_RTS:
return EHCA_QPS_RTS;
case IB_QPS_SQD:
return EHCA_QPS_SQD;
case IB_QPS_SQE:
return EHCA_QPS_SQE;
case IB_QPS_ERR:
return EHCA_QPS_ERR;
default:
ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
return -EINVAL;
}
}
/*
* ehca2ib_qp_state maps ehca to IB qp_state
* returns ib qp state corresponding to given ehca qp state
*/
static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
ehca_qp_state)
{
switch (ehca_qp_state) {
case EHCA_QPS_RESET:
return IB_QPS_RESET;
case EHCA_QPS_INIT:
return IB_QPS_INIT;
case EHCA_QPS_RTR:
return IB_QPS_RTR;
case EHCA_QPS_RTS:
return IB_QPS_RTS;
case EHCA_QPS_SQD:
return IB_QPS_SQD;
case EHCA_QPS_SQE:
return IB_QPS_SQE;
case EHCA_QPS_ERR:
return IB_QPS_ERR;
default:
ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
return -EINVAL;
}
}
/*
* ehca_qp_type used as index for req_attr and opt_attr of
* struct ehca_modqp_statetrans
*/
enum ehca_qp_type {
QPT_RC = 0,
QPT_UC = 1,
QPT_UD = 2,
QPT_SQP = 3,
QPT_MAX
};
/*
* ib2ehcaqptype maps Ib to ehca qp_type
* returns ehca qp type corresponding to ib qp type
*/
static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
{
switch (ibqptype) {
case IB_QPT_SMI:
case IB_QPT_GSI:
return QPT_SQP;
case IB_QPT_RC:
return QPT_RC;
case IB_QPT_UC:
return QPT_UC;
case IB_QPT_UD:
return QPT_UD;
default:
ehca_gen_err("Invalid ibqptype=%x", ibqptype);
return -EINVAL;
}
}
static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
int ib_tostate)
{
int index = -EINVAL;
switch (ib_tostate) {
case IB_QPS_RESET:
index = IB_QPST_ANY2RESET;
break;
case IB_QPS_INIT:
switch (ib_fromstate) {
case IB_QPS_RESET:
index = IB_QPST_RESET2INIT;
break;
case IB_QPS_INIT:
index = IB_QPST_INIT2INIT;
break;
}
break;
case IB_QPS_RTR:
if (ib_fromstate == IB_QPS_INIT)
index = IB_QPST_INIT2RTR;
break;
case IB_QPS_RTS:
switch (ib_fromstate) {
case IB_QPS_RTR:
index = IB_QPST_RTR2RTS;
break;
case IB_QPS_RTS:
index = IB_QPST_RTS2RTS;
break;
case IB_QPS_SQD:
index = IB_QPST_SQD2RTS;
break;
case IB_QPS_SQE:
index = IB_QPST_SQE2RTS;
break;
}
break;
case IB_QPS_SQD:
if (ib_fromstate == IB_QPS_RTS)
index = IB_QPST_RTS2SQD;
break;
case IB_QPS_SQE:
break;
case IB_QPS_ERR:
index = IB_QPST_ANY2ERR;
break;
default:
break;
}
return index;
}
/*
* ibqptype2servicetype returns hcp service type corresponding to given
* ib qp type used by create_qp()
*/
static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
{
switch (ibqptype) {
case IB_QPT_SMI:
case IB_QPT_GSI:
return ST_UD;
case IB_QPT_RC:
return ST_RC;
case IB_QPT_UC:
return ST_UC;
case IB_QPT_UD:
return ST_UD;
case IB_QPT_RAW_IPV6:
return -EINVAL;
case IB_QPT_RAW_ETHERTYPE:
return -EINVAL;
default:
ehca_gen_err("Invalid ibqptype=%x", ibqptype);
return -EINVAL;
}
}
/*
* init userspace queue info from ipz_queue data
*/
static inline void queue2resp(struct ipzu_queue_resp *resp,
struct ipz_queue *queue)
{
resp->qe_size = queue->qe_size;
resp->act_nr_of_sg = queue->act_nr_of_sg;
resp->queue_length = queue->queue_length;
resp->pagesize = queue->pagesize;
resp->toggle_state = queue->toggle_state;
resp->offset = queue->offset;
}
/*
* init_qp_queue initializes/constructs r/squeue and registers queue pages.
*/
static inline int init_qp_queue(struct ehca_shca *shca,
struct ehca_pd *pd,
struct ehca_qp *my_qp,
struct ipz_queue *queue,
int q_type,
u64 expected_hret,
struct ehca_alloc_queue_parms *parms,
int wqe_size)
{
int ret, cnt, ipz_rc, nr_q_pages;
void *vpage;
u64 rpage, h_ret;
struct ib_device *ib_dev = &shca->ib_device;
struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
if (!parms->queue_size)
return 0;
if (parms->is_small) {
nr_q_pages = 1;
ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
128 << parms->page_size,
wqe_size, parms->act_nr_sges, 1);
} else {
nr_q_pages = parms->queue_size;
ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
EHCA_PAGESIZE, wqe_size,
parms->act_nr_sges, 0);
}
if (!ipz_rc) {
ehca_err(ib_dev, "Cannot allocate page for queue. ipz_rc=%i",
ipz_rc);
return -EBUSY;
}
/* register queue pages */
for (cnt = 0; cnt < nr_q_pages; cnt++) {
vpage = ipz_qpageit_get_inc(queue);
if (!vpage) {
ehca_err(ib_dev, "ipz_qpageit_get_inc() "
"failed p_vpage= %p", vpage);
ret = -EINVAL;
goto init_qp_queue1;
}
rpage = virt_to_abs(vpage);
h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
my_qp->ipz_qp_handle,
NULL, 0, q_type,
rpage, parms->is_small ? 0 : 1,
my_qp->galpas.kernel);
if (cnt == (nr_q_pages - 1)) { /* last page! */
if (h_ret != expected_hret) {
ehca_err(ib_dev, "hipz_qp_register_rpage() "
"h_ret=%lli", h_ret);
ret = ehca2ib_return_code(h_ret);
goto init_qp_queue1;
}
vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
if (vpage) {
ehca_err(ib_dev, "ipz_qpageit_get_inc() "
"should not succeed vpage=%p", vpage);
ret = -EINVAL;
goto init_qp_queue1;
}
} else {
if (h_ret != H_PAGE_REGISTERED) {
ehca_err(ib_dev, "hipz_qp_register_rpage() "
"h_ret=%lli", h_ret);
ret = ehca2ib_return_code(h_ret);
goto init_qp_queue1;
}
}
}
ipz_qeit_reset(queue);
return 0;
init_qp_queue1:
ipz_queue_dtor(pd, queue);
return ret;
}
static inline int ehca_calc_wqe_size(int act_nr_sge, int is_llqp)
{
if (is_llqp)
return 128 << act_nr_sge;
else
return offsetof(struct ehca_wqe,
u.nud.sg_list[act_nr_sge]);
}
static void ehca_determine_small_queue(struct ehca_alloc_queue_parms *queue,
int req_nr_sge, int is_llqp)
{
u32 wqe_size, q_size;
int act_nr_sge = req_nr_sge;
if (!is_llqp)
/* round up #SGEs so WQE size is a power of 2 */
for (act_nr_sge = 4; act_nr_sge <= 252;
act_nr_sge = 4 + 2 * act_nr_sge)
if (act_nr_sge >= req_nr_sge)
break;
wqe_size = ehca_calc_wqe_size(act_nr_sge, is_llqp);
q_size = wqe_size * (queue->max_wr + 1);
if (q_size <= 512)
queue->page_size = 2;
else if (q_size <= 1024)
queue->page_size = 3;
else
queue->page_size = 0;
queue->is_small = (queue->page_size != 0);
}
/* needs to be called with cq->spinlock held */
void ehca_add_to_err_list(struct ehca_qp *qp, int on_sq)
{
struct list_head *list, *node;
/* TODO: support low latency QPs */
if (qp->ext_type == EQPT_LLQP)
return;
if (on_sq) {
list = &qp->send_cq->sqp_err_list;
node = &qp->sq_err_node;
} else {
list = &qp->recv_cq->rqp_err_list;
node = &qp->rq_err_node;
}
if (list_empty(node))
list_add_tail(node, list);
return;
}
static void del_from_err_list(struct ehca_cq *cq, struct list_head *node)
{
unsigned long flags;
spin_lock_irqsave(&cq->spinlock, flags);
if (!list_empty(node))
list_del_init(node);
spin_unlock_irqrestore(&cq->spinlock, flags);
}
static void reset_queue_map(struct ehca_queue_map *qmap)
{
int i;
qmap->tail = qmap->entries - 1;
qmap->left_to_poll = 0;
qmap->next_wqe_idx = 0;
for (i = 0; i < qmap->entries; i++) {
qmap->map[i].reported = 1;
qmap->map[i].cqe_req = 0;
}
}
/*
* Create an ib_qp struct that is either a QP or an SRQ, depending on
* the value of the is_srq parameter. If init_attr and srq_init_attr share
* fields, the field out of init_attr is used.
*/
static struct ehca_qp *internal_create_qp(
struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata, int is_srq)
{
struct ehca_qp *my_qp, *my_srq = NULL;
struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
ib_device);
struct ib_ucontext *context = NULL;
u64 h_ret;
int is_llqp = 0, has_srq = 0, is_user = 0;
int qp_type, max_send_sge, max_recv_sge, ret;
/* h_call's out parameters */
struct ehca_alloc_qp_parms parms;
u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
unsigned long flags;
if (!atomic_add_unless(&shca->num_qps, 1, shca->max_num_qps)) {
ehca_err(pd->device, "Unable to create QP, max number of %i "
"QPs reached.", shca->max_num_qps);
ehca_err(pd->device, "To increase the maximum number of QPs "
"use the number_of_qps module parameter.\n");
return ERR_PTR(-ENOSPC);
}
if (init_attr->create_flags) {
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
memset(&parms, 0, sizeof(parms));
qp_type = init_attr->qp_type;
if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
init_attr->sq_sig_type);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
/* save LLQP info */
if (qp_type & 0x80) {
is_llqp = 1;
parms.ext_type = EQPT_LLQP;
parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
}
qp_type &= 0x1F;
init_attr->qp_type &= 0x1F;
/* handle SRQ base QPs */
if (init_attr->srq) {
my_srq = container_of(init_attr->srq, struct ehca_qp, ib_srq);
if (qp_type == IB_QPT_UC) {
ehca_err(pd->device, "UC with SRQ not supported");
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
has_srq = 1;
parms.ext_type = EQPT_SRQBASE;
parms.srq_qpn = my_srq->real_qp_num;
}
if (is_llqp && has_srq) {
ehca_err(pd->device, "LLQPs can't have an SRQ");
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
/* handle SRQs */
if (is_srq) {
parms.ext_type = EQPT_SRQ;
parms.srq_limit = srq_init_attr->attr.srq_limit;
if (init_attr->cap.max_recv_sge > 3) {
ehca_err(pd->device, "no more than three SGEs "
"supported for SRQ pd=%p max_sge=%x",
pd, init_attr->cap.max_recv_sge);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
}
/* check QP type */
if (qp_type != IB_QPT_UD &&
qp_type != IB_QPT_UC &&
qp_type != IB_QPT_RC &&
qp_type != IB_QPT_SMI &&
qp_type != IB_QPT_GSI) {
ehca_err(pd->device, "wrong QP Type=%x", qp_type);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
if (is_llqp) {
switch (qp_type) {
case IB_QPT_RC:
if ((init_attr->cap.max_send_wr > 255) ||
(init_attr->cap.max_recv_wr > 255)) {
ehca_err(pd->device,
"Invalid Number of max_sq_wr=%x "
"or max_rq_wr=%x for RC LLQP",
init_attr->cap.max_send_wr,
init_attr->cap.max_recv_wr);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
break;
case IB_QPT_UD:
if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
ehca_err(pd->device, "UD LLQP not supported "
"by this adapter");
atomic_dec(&shca->num_qps);
return ERR_PTR(-ENOSYS);
}
if (!(init_attr->cap.max_send_sge <= 5
&& init_attr->cap.max_send_sge >= 1
&& init_attr->cap.max_recv_sge <= 5
&& init_attr->cap.max_recv_sge >= 1)) {
ehca_err(pd->device,
"Invalid Number of max_send_sge=%x "
"or max_recv_sge=%x for UD LLQP",
init_attr->cap.max_send_sge,
init_attr->cap.max_recv_sge);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
} else if (init_attr->cap.max_send_wr > 255) {
ehca_err(pd->device,
"Invalid Number of "
"max_send_wr=%x for UD QP_TYPE=%x",
init_attr->cap.max_send_wr, qp_type);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
break;
default:
ehca_err(pd->device, "unsupported LL QP Type=%x",
qp_type);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
} else {
int max_sge = (qp_type == IB_QPT_UD || qp_type == IB_QPT_SMI
|| qp_type == IB_QPT_GSI) ? 250 : 252;
if (init_attr->cap.max_send_sge > max_sge
|| init_attr->cap.max_recv_sge > max_sge) {
ehca_err(pd->device, "Invalid number of SGEs requested "
"send_sge=%x recv_sge=%x max_sge=%x",
init_attr->cap.max_send_sge,
init_attr->cap.max_recv_sge, max_sge);
atomic_dec(&shca->num_qps);
return ERR_PTR(-EINVAL);
}
}
my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
if (!my_qp) {
ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
atomic_dec(&shca->num_qps);
return ERR_PTR(-ENOMEM);
}
if (pd->uobject && udata) {
is_user = 1;
context = pd->uobject->context;
}
atomic_set(&my_qp->nr_events, 0);
init_waitqueue_head(&my_qp->wait_completion);
spin_lock_init(&my_qp->spinlock_s);
spin_lock_init(&my_qp->spinlock_r);
my_qp->qp_type = qp_type;
my_qp->ext_type = parms.ext_type;
my_qp->state = IB_QPS_RESET;
if (init_attr->recv_cq)
my_qp->recv_cq =
container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
if (init_attr->send_cq)
my_qp->send_cq =
container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
do {
if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
ret = -ENOMEM;
ehca_err(pd->device, "Can't reserve idr resources.");
goto create_qp_exit0;
}
write_lock_irqsave(&ehca_qp_idr_lock, flags);
ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
} while (ret == -EAGAIN);
if (ret) {
ret = -ENOMEM;
ehca_err(pd->device, "Can't allocate new idr entry.");
goto create_qp_exit0;
}
if (my_qp->token > 0x1FFFFFF) {
ret = -EINVAL;
ehca_err(pd->device, "Invalid number of qp");
goto create_qp_exit1;
}
if (has_srq)
parms.srq_token = my_qp->token;
parms.servicetype = ibqptype2servicetype(qp_type);
if (parms.servicetype < 0) {
ret = -EINVAL;
ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
goto create_qp_exit1;
}
/* Always signal by WQE so we can hide circ. WQEs */
parms.sigtype = HCALL_SIGT_BY_WQE;
/* UD_AV CIRCUMVENTION */
max_send_sge = init_attr->cap.max_send_sge;
max_recv_sge = init_attr->cap.max_recv_sge;
if (parms.servicetype == ST_UD && !is_llqp) {
max_send_sge += 2;
max_recv_sge += 2;
}
parms.token = my_qp->token;
parms.eq_handle = shca->eq.ipz_eq_handle;
parms.pd = my_pd->fw_pd;
if (my_qp->send_cq)
parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
if (my_qp->recv_cq)
parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
parms.squeue.max_wr = init_attr->cap.max_send_wr;
parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
parms.squeue.max_sge = max_send_sge;
parms.rqueue.max_sge = max_recv_sge;
/* RC QPs need one more SWQE for unsolicited ack circumvention */
if (qp_type == IB_QPT_RC)
parms.squeue.max_wr++;
if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
if (HAS_SQ(my_qp))
ehca_determine_small_queue(
&parms.squeue, max_send_sge, is_llqp);
if (HAS_RQ(my_qp))
ehca_determine_small_queue(
&parms.rqueue, max_recv_sge, is_llqp);
parms.qp_storage =
(parms.squeue.is_small || parms.rqueue.is_small);
}
h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms, is_user);
if (h_ret != H_SUCCESS) {
ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%lli",
h_ret);
ret = ehca2ib_return_code(h_ret);
goto create_qp_exit1;
}
ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
my_qp->ipz_qp_handle = parms.qp_handle;
my_qp->galpas = parms.galpas;
swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
switch (qp_type) {
case IB_QPT_RC:
if (is_llqp) {
parms.squeue.act_nr_sges = 1;
parms.rqueue.act_nr_sges = 1;
}
/* hide the extra WQE */
parms.squeue.act_nr_wqes--;
break;
case IB_QPT_UD:
case IB_QPT_GSI:
case IB_QPT_SMI:
/* UD circumvention */
if (is_llqp) {
parms.squeue.act_nr_sges = 1;
parms.rqueue.act_nr_sges = 1;
} else {
parms.squeue.act_nr_sges -= 2;
parms.rqueue.act_nr_sges -= 2;
}
if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
}
break;
default:
break;
}
/* initialize r/squeue and register queue pages */
if (HAS_SQ(my_qp)) {
ret = init_qp_queue(
shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
&parms.squeue, swqe_size);
if (ret) {
ehca_err(pd->device, "Couldn't initialize squeue "
"and pages ret=%i", ret);
goto create_qp_exit2;
}
if (!is_user) {
my_qp->sq_map.entries = my_qp->ipz_squeue.queue_length /
my_qp->ipz_squeue.qe_size;
my_qp->sq_map.map = vmalloc(my_qp->sq_map.entries *
sizeof(struct ehca_qmap_entry));
if (!my_qp->sq_map.map) {
ehca_err(pd->device, "Couldn't allocate squeue "
"map ret=%i", ret);
goto create_qp_exit3;
}
INIT_LIST_HEAD(&my_qp->sq_err_node);
/* to avoid the generation of bogus flush CQEs */
reset_queue_map(&my_qp->sq_map);
}
}
if (HAS_RQ(my_qp)) {
ret = init_qp_queue(
shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
H_SUCCESS, &parms.rqueue, rwqe_size);
if (ret) {
ehca_err(pd->device, "Couldn't initialize rqueue "
"and pages ret=%i", ret);
goto create_qp_exit4;
}
if (!is_user) {
my_qp->rq_map.entries = my_qp->ipz_rqueue.queue_length /
my_qp->ipz_rqueue.qe_size;
my_qp->rq_map.map = vmalloc(my_qp->rq_map.entries *
sizeof(struct ehca_qmap_entry));
if (!my_qp->rq_map.map) {
ehca_err(pd->device, "Couldn't allocate squeue "
"map ret=%i", ret);
goto create_qp_exit5;
}
INIT_LIST_HEAD(&my_qp->rq_err_node);
/* to avoid the generation of bogus flush CQEs */
reset_queue_map(&my_qp->rq_map);
}
} else if (init_attr->srq && !is_user) {
/* this is a base QP, use the queue map of the SRQ */
my_qp->rq_map = my_srq->rq_map;
INIT_LIST_HEAD(&my_qp->rq_err_node);
my_qp->ipz_rqueue = my_srq->ipz_rqueue;
}
if (is_srq) {
my_qp->ib_srq.pd = &my_pd->ib_pd;
my_qp->ib_srq.device = my_pd->ib_pd.device;
my_qp->ib_srq.srq_context = init_attr->qp_context;
my_qp->ib_srq.event_handler = init_attr->event_handler;
} else {
my_qp->ib_qp.qp_num = ib_qp_num;
my_qp->ib_qp.pd = &my_pd->ib_pd;
my_qp->ib_qp.device = my_pd->ib_pd.device;
my_qp->ib_qp.recv_cq = init_attr->recv_cq;
my_qp->ib_qp.send_cq = init_attr->send_cq;
my_qp->ib_qp.qp_type = qp_type;
my_qp->ib_qp.srq = init_attr->srq;
my_qp->ib_qp.qp_context = init_attr->qp_context;
my_qp->ib_qp.event_handler = init_attr->event_handler;
}
init_attr->cap.max_inline_data = 0; /* not supported yet */
init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
my_qp->init_attr = *init_attr;
if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
&my_qp->ib_qp;
if (ehca_nr_ports < 0) {
/* alloc array to cache subsequent modify qp parms
* for autodetect mode
*/
my_qp->mod_qp_parm =
kzalloc(EHCA_MOD_QP_PARM_MAX *
sizeof(*my_qp->mod_qp_parm),
GFP_KERNEL);
if (!my_qp->mod_qp_parm) {
ehca_err(pd->device,
"Could not alloc mod_qp_parm");
goto create_qp_exit5;
}
}
}
/* NOTE: define_apq0() not supported yet */
if (qp_type == IB_QPT_GSI) {
h_ret = ehca_define_sqp(shca, my_qp, init_attr);
if (h_ret != H_SUCCESS) {
kfree(my_qp->mod_qp_parm);
my_qp->mod_qp_parm = NULL;
/* the QP pointer is no longer valid */
shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
NULL;
ret = ehca2ib_return_code(h_ret);
goto create_qp_exit6;
}
}
if (my_qp->send_cq) {
ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
if (ret) {
ehca_err(pd->device,
"Couldn't assign qp to send_cq ret=%i", ret);
goto create_qp_exit7;
}
}
/* copy queues, galpa data to user space */
if (context && udata) {
struct ehca_create_qp_resp resp;
memset(&resp, 0, sizeof(resp));
resp.qp_num = my_qp->real_qp_num;
resp.token = my_qp->token;
resp.qp_type = my_qp->qp_type;
resp.ext_type = my_qp->ext_type;
resp.qkey = my_qp->qkey;
resp.real_qp_num = my_qp->real_qp_num;
if (HAS_SQ(my_qp))
queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
if (HAS_RQ(my_qp))
queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
resp.fw_handle_ofs = (u32)
(my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
ehca_err(pd->device, "Copy to udata failed");
ret = -EINVAL;
goto create_qp_exit8;
}
}
return my_qp;
create_qp_exit8:
ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
create_qp_exit7:
kfree(my_qp->mod_qp_parm);
create_qp_exit6:
if (HAS_RQ(my_qp) && !is_user)
vfree(my_qp->rq_map.map);
create_qp_exit5:
if (HAS_RQ(my_qp))
ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
create_qp_exit4:
if (HAS_SQ(my_qp) && !is_user)
vfree(my_qp->sq_map.map);
create_qp_exit3:
if (HAS_SQ(my_qp))
ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
create_qp_exit2:
hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
create_qp_exit1:
write_lock_irqsave(&ehca_qp_idr_lock, flags);
idr_remove(&ehca_qp_idr, my_qp->token);
write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
create_qp_exit0:
kmem_cache_free(qp_cache, my_qp);
atomic_dec(&shca->num_qps);
return ERR_PTR(ret);
}
struct ib_qp *ehca_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *qp_init_attr,
struct ib_udata *udata)
{
struct ehca_qp *ret;
ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
}
static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
struct ib_uobject *uobject);
struct ib_srq *ehca_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata)
{
struct ib_qp_init_attr qp_init_attr;
struct ehca_qp *my_qp;
struct ib_srq *ret;
struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
ib_device);
struct hcp_modify_qp_control_block *mqpcb;
u64 hret, update_mask;
if (srq_init_attr->srq_type != IB_SRQT_BASIC)
return ERR_PTR(-ENOSYS);
/* For common attributes, internal_create_qp() takes its info
* out of qp_init_attr, so copy all common attrs there.
*/
memset(&qp_init_attr, 0, sizeof(qp_init_attr));
qp_init_attr.event_handler = srq_init_attr->event_handler;
qp_init_attr.qp_context = srq_init_attr->srq_context;
qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
qp_init_attr.qp_type = IB_QPT_RC;
qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
if (IS_ERR(my_qp))
return (struct ib_srq *)my_qp;
/* copy back return values */
srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
srq_init_attr->attr.max_sge = 3;
/* drive SRQ into RTR state */
mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
if (!mqpcb) {
ehca_err(pd->device, "Could not get zeroed page for mqpcb "
"ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
ret = ERR_PTR(-ENOMEM);
goto create_srq1;
}
mqpcb->qp_state = EHCA_QPS_INIT;
mqpcb->prim_phys_port = 1;
update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
hret = hipz_h_modify_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
update_mask,
mqpcb, my_qp->galpas.kernel);
if (hret != H_SUCCESS) {
ehca_err(pd->device, "Could not modify SRQ to INIT "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, my_qp->real_qp_num, hret);
goto create_srq2;
}
mqpcb->qp_enable = 1;
update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
hret = hipz_h_modify_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
update_mask,
mqpcb, my_qp->galpas.kernel);
if (hret != H_SUCCESS) {
ehca_err(pd->device, "Could not enable SRQ "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, my_qp->real_qp_num, hret);
goto create_srq2;
}
mqpcb->qp_state = EHCA_QPS_RTR;
update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
hret = hipz_h_modify_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
update_mask,
mqpcb, my_qp->galpas.kernel);
if (hret != H_SUCCESS) {
ehca_err(pd->device, "Could not modify SRQ to RTR "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, my_qp->real_qp_num, hret);
goto create_srq2;
}
ehca_free_fw_ctrlblock(mqpcb);
return &my_qp->ib_srq;
create_srq2:
ret = ERR_PTR(ehca2ib_return_code(hret));
ehca_free_fw_ctrlblock(mqpcb);
create_srq1:
internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
return ret;
}
/*
* prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
* set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
* returns total number of bad wqes in bad_wqe_cnt
*/
static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
int *bad_wqe_cnt)
{
u64 h_ret;
struct ipz_queue *squeue;
void *bad_send_wqe_p, *bad_send_wqe_v;
u64 q_ofs;
struct ehca_wqe *wqe;
int qp_num = my_qp->ib_qp.qp_num;
/* get send wqe pointer */
h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
my_qp->ipz_qp_handle, &my_qp->pf,
&bad_send_wqe_p, NULL, 2);
if (h_ret != H_SUCCESS) {
ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
" ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, qp_num, h_ret);
return ehca2ib_return_code(h_ret);
}
bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
qp_num, bad_send_wqe_p);
/* convert wqe pointer to vadr */
bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
if (ehca_debug_level >= 2)
ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
squeue = &my_qp->ipz_squeue;
if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
" bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
return -EFAULT;
}
/* loop sets wqe's purge bit */
wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
*bad_wqe_cnt = 0;
while (wqe->optype != 0xff && wqe->wqef != 0xff) {
if (ehca_debug_level >= 2)
ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
wqe->nr_of_data_seg = 0; /* suppress data access */
wqe->wqef = WQEF_PURGE; /* WQE to be purged */
q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
*bad_wqe_cnt = (*bad_wqe_cnt)+1;
}
/*
* bad wqe will be reprocessed and ignored when pol_cq() is called,
* i.e. nr of wqes with flush error status is one less
*/
ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
qp_num, (*bad_wqe_cnt)-1);
wqe->wqef = 0;
return 0;
}
static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
struct ehca_queue_map *qmap)
{
void *wqe_v;
u64 q_ofs;
u32 wqe_idx;
unsigned int tail_idx;
/* convert real to abs address */
wqe_p = wqe_p & (~(1UL << 63));
wqe_v = abs_to_virt(wqe_p);
if (ipz_queue_abs_to_offset(ipz_queue, wqe_p, &q_ofs)) {
ehca_gen_err("Invalid offset for calculating left cqes "
"wqe_p=%#llx wqe_v=%p\n", wqe_p, wqe_v);
return -EFAULT;
}
tail_idx = next_index(qmap->tail, qmap->entries);
wqe_idx = q_ofs / ipz_queue->qe_size;
/* check all processed wqes, whether a cqe is requested or not */
while (tail_idx != wqe_idx) {
if (qmap->map[tail_idx].cqe_req)
qmap->left_to_poll++;
tail_idx = next_index(tail_idx, qmap->entries);
}
/* save index in queue, where we have to start flushing */
qmap->next_wqe_idx = wqe_idx;
return 0;
}
static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
{
u64 h_ret;
void *send_wqe_p, *recv_wqe_p;
int ret;
unsigned long flags;
int qp_num = my_qp->ib_qp.qp_num;
/* this hcall is not supported on base QPs */
if (my_qp->ext_type != EQPT_SRQBASE) {
/* get send and receive wqe pointer */
h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
my_qp->ipz_qp_handle, &my_qp->pf,
&send_wqe_p, &recv_wqe_p, 4);
if (h_ret != H_SUCCESS) {
ehca_err(&shca->ib_device, "disable_and_get_wqe() "
"failed ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, qp_num, h_ret);
return ehca2ib_return_code(h_ret);
}
/*
* acquire lock to ensure that nobody is polling the cq which
* could mean that the qmap->tail pointer is in an
* inconsistent state.
*/
spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
ret = calc_left_cqes((u64)send_wqe_p, &my_qp->ipz_squeue,
&my_qp->sq_map);
spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
if (ret)
return ret;
spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
ret = calc_left_cqes((u64)recv_wqe_p, &my_qp->ipz_rqueue,
&my_qp->rq_map);
spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
if (ret)
return ret;
} else {
spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
my_qp->sq_map.left_to_poll = 0;
my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
my_qp->sq_map.entries);
spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
my_qp->rq_map.left_to_poll = 0;
my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
my_qp->rq_map.entries);
spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
}
/* this assures flush cqes being generated only for pending wqes */
if ((my_qp->sq_map.left_to_poll == 0) &&
(my_qp->rq_map.left_to_poll == 0)) {
spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
ehca_add_to_err_list(my_qp, 1);
spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
if (HAS_RQ(my_qp)) {
spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
ehca_add_to_err_list(my_qp, 0);
spin_unlock_irqrestore(&my_qp->recv_cq->spinlock,
flags);
}
}
return 0;
}
/*
* internal_modify_qp with circumvention to handle aqp0 properly
* smi_reset2init indicates if this is an internal reset-to-init-call for
* smi. This flag must always be zero if called from ehca_modify_qp()!
* This internal func was intorduced to avoid recursion of ehca_modify_qp()!
*/
static int internal_modify_qp(struct ib_qp *ibqp,
struct ib_qp_attr *attr,
int attr_mask, int smi_reset2init)
{
enum ib_qp_state qp_cur_state, qp_new_state;
int cnt, qp_attr_idx, ret = 0;
enum ib_qp_statetrans statetrans;
struct hcp_modify_qp_control_block *mqpcb;
struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
struct ehca_shca *shca =
container_of(ibqp->pd->device, struct ehca_shca, ib_device);
u64 update_mask;
u64 h_ret;
int bad_wqe_cnt = 0;
int is_user = 0;
int squeue_locked = 0;
unsigned long flags = 0;
/* do query_qp to obtain current attr values */
mqpcb = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
if (!mqpcb) {
ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
"ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
return -ENOMEM;
}
h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
mqpcb, my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ehca_err(ibqp->device, "hipz_h_query_qp() failed "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, ibqp->qp_num, h_ret);
ret = ehca2ib_return_code(h_ret);
goto modify_qp_exit1;
}
if (ibqp->uobject)
is_user = 1;
qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
if (qp_cur_state == -EINVAL) { /* invalid qp state */
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
"ehca_qp=%p qp_num=%x",
mqpcb->qp_state, my_qp, ibqp->qp_num);
goto modify_qp_exit1;
}
/*
* circumvention to set aqp0 initial state to init
* as expected by IB spec
*/
if (smi_reset2init == 0 &&
ibqp->qp_type == IB_QPT_SMI &&
qp_cur_state == IB_QPS_RESET &&
(attr_mask & IB_QP_STATE) &&
attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
struct ib_qp_attr smiqp_attr = {
.qp_state = IB_QPS_INIT,
.port_num = my_qp->init_attr.port_num,
.pkey_index = 0,
.qkey = 0
};
int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
IB_QP_PKEY_INDEX | IB_QP_QKEY;
int smirc = internal_modify_qp(
ibqp, &smiqp_attr, smiqp_attr_mask, 1);
if (smirc) {
ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
"ehca_modify_qp() rc=%i", smirc);
ret = H_PARAMETER;
goto modify_qp_exit1;
}
qp_cur_state = IB_QPS_INIT;
ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
}
/* is transmitted current state equal to "real" current state */
if ((attr_mask & IB_QP_CUR_STATE) &&
qp_cur_state != attr->cur_qp_state) {
ret = -EINVAL;
ehca_err(ibqp->device,
"Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
" actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
goto modify_qp_exit1;
}
ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
"new qp_state=%x attribute_mask=%x",
my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
if (!smi_reset2init &&
!ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
attr_mask)) {
ret = -EINVAL;
ehca_err(ibqp->device,
"Invalid qp transition new_state=%x cur_state=%x "
"ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
goto modify_qp_exit1;
}
mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
if (mqpcb->qp_state)
update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
else {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid new qp state=%x "
"ehca_qp=%p qp_num=%x",
qp_new_state, my_qp, ibqp->qp_num);
goto modify_qp_exit1;
}
/* retrieve state transition struct to get req and opt attrs */
statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
if (statetrans < 0) {
ret = -EINVAL;
ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
"new_qp_state=%x State_xsition=%x ehca_qp=%p "
"qp_num=%x", qp_cur_state, qp_new_state,
statetrans, my_qp, ibqp->qp_num);
goto modify_qp_exit1;
}
qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
if (qp_attr_idx < 0) {
ret = qp_attr_idx;
ehca_err(ibqp->device,
"Invalid QP type=%x ehca_qp=%p qp_num=%x",
ibqp->qp_type, my_qp, ibqp->qp_num);
goto modify_qp_exit1;
}
ehca_dbg(ibqp->device,
"ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
my_qp, ibqp->qp_num, statetrans);
/* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
* in non-LL UD QPs.
*/
if ((my_qp->qp_type == IB_QPT_UD) &&
(my_qp->ext_type != EQPT_LLQP) &&
(statetrans == IB_QPST_INIT2RTR) &&
(shca->hw_level >= 0x22)) {
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
mqpcb->send_grh_flag = 1;
}
/* sqe -> rts: set purge bit of bad wqe before actual trans */
if ((my_qp->qp_type == IB_QPT_UD ||
my_qp->qp_type == IB_QPT_GSI ||
my_qp->qp_type == IB_QPT_SMI) &&
statetrans == IB_QPST_SQE2RTS) {
/* mark next free wqe if kernel */
if (!ibqp->uobject) {
struct ehca_wqe *wqe;
/* lock send queue */
spin_lock_irqsave(&my_qp->spinlock_s, flags);
squeue_locked = 1;
/* mark next free wqe */
wqe = (struct ehca_wqe *)
ipz_qeit_get(&my_qp->ipz_squeue);
wqe->optype = wqe->wqef = 0xff;
ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
ibqp->qp_num, wqe);
}
ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
if (ret) {
ehca_err(ibqp->device, "prepare_sqe_rts() failed "
"ehca_qp=%p qp_num=%x ret=%i",
my_qp, ibqp->qp_num, ret);
goto modify_qp_exit2;
}
}
/*
* enable RDMA_Atomic_Control if reset->init und reliable con
* this is necessary since gen2 does not provide that flag,
* but pHyp requires it
*/
if (statetrans == IB_QPST_RESET2INIT &&
(ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
mqpcb->rdma_atomic_ctrl = 3;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
}
/* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
if (statetrans == IB_QPST_INIT2RTR &&
(ibqp->qp_type == IB_QPT_UC) &&
!(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
}
if (attr_mask & IB_QP_PKEY_INDEX) {
if (attr->pkey_index >= 16) {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid pkey_index=%x. "
"ehca_qp=%p qp_num=%x max_pkey_index=f",
attr->pkey_index, my_qp, ibqp->qp_num);
goto modify_qp_exit2;
}
mqpcb->prim_p_key_idx = attr->pkey_index;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
}
if (attr_mask & IB_QP_PORT) {
struct ehca_sport *sport;
struct ehca_qp *aqp1;
if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid port=%x. "
"ehca_qp=%p qp_num=%x num_ports=%x",
attr->port_num, my_qp, ibqp->qp_num,
shca->num_ports);
goto modify_qp_exit2;
}
sport = &shca->sport[attr->port_num - 1];
if (!sport->ibqp_sqp[IB_QPT_GSI]) {
/* should not occur */
ret = -EFAULT;
ehca_err(ibqp->device, "AQP1 was not created for "
"port=%x", attr->port_num);
goto modify_qp_exit2;
}
aqp1 = container_of(sport->ibqp_sqp[IB_QPT_GSI],
struct ehca_qp, ib_qp);
if (ibqp->qp_type != IB_QPT_GSI &&
ibqp->qp_type != IB_QPT_SMI &&
aqp1->mod_qp_parm) {
/*
* firmware will reject this modify_qp() because
* port is not activated/initialized fully
*/
ret = -EFAULT;
ehca_warn(ibqp->device, "Couldn't modify qp port=%x: "
"either port is being activated (try again) "
"or cabling issue", attr->port_num);
goto modify_qp_exit2;
}
mqpcb->prim_phys_port = attr->port_num;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
}
if (attr_mask & IB_QP_QKEY) {
mqpcb->qkey = attr->qkey;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
}
if (attr_mask & IB_QP_AV) {
mqpcb->dlid = attr->ah_attr.dlid;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
mqpcb->service_level = attr->ah_attr.sl;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
if (ehca_calc_ipd(shca, mqpcb->prim_phys_port,
attr->ah_attr.static_rate,
&mqpcb->max_static_rate)) {
ret = -EINVAL;
goto modify_qp_exit2;
}
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
/*
* Always supply the GRH flag, even if it's zero, to give the
* hypervisor a clear "yes" or "no" instead of a "perhaps"
*/
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
/*
* only if GRH is TRUE we might consider SOURCE_GID_IDX
* and DEST_GID otherwise phype will return H_ATTR_PARM!!!
*/
if (attr->ah_attr.ah_flags == IB_AH_GRH) {
mqpcb->send_grh_flag = 1;
mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
for (cnt = 0; cnt < 16; cnt++)
mqpcb->dest_gid.byte[cnt] =
attr->ah_attr.grh.dgid.raw[cnt];
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
mqpcb->flow_label = attr->ah_attr.grh.flow_label;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
}
}
if (attr_mask & IB_QP_PATH_MTU) {
/* store ld(MTU) */
my_qp->mtu_shift = attr->path_mtu + 7;
mqpcb->path_mtu = attr->path_mtu;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
}
if (attr_mask & IB_QP_TIMEOUT) {
mqpcb->timeout = attr->timeout;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
}
if (attr_mask & IB_QP_RETRY_CNT) {
mqpcb->retry_count = attr->retry_cnt;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
}
if (attr_mask & IB_QP_RNR_RETRY) {
mqpcb->rnr_retry_count = attr->rnr_retry;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
}
if (attr_mask & IB_QP_RQ_PSN) {
mqpcb->receive_psn = attr->rq_psn;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
attr->max_dest_rd_atomic : 2;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
attr->max_rd_atomic : 2;
update_mask |=
EHCA_BMASK_SET
(MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
}
if (attr_mask & IB_QP_ALT_PATH) {
if (attr->alt_port_num < 1
|| attr->alt_port_num > shca->num_ports) {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid alt_port=%x. "
"ehca_qp=%p qp_num=%x num_ports=%x",
attr->alt_port_num, my_qp, ibqp->qp_num,
shca->num_ports);
goto modify_qp_exit2;
}
mqpcb->alt_phys_port = attr->alt_port_num;
if (attr->alt_pkey_index >= 16) {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid alt_pkey_index=%x. "
"ehca_qp=%p qp_num=%x max_pkey_index=f",
attr->pkey_index, my_qp, ibqp->qp_num);
goto modify_qp_exit2;
}
mqpcb->alt_p_key_idx = attr->alt_pkey_index;
mqpcb->timeout_al = attr->alt_timeout;
mqpcb->dlid_al = attr->alt_ah_attr.dlid;
mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
mqpcb->service_level_al = attr->alt_ah_attr.sl;
if (ehca_calc_ipd(shca, mqpcb->alt_phys_port,
attr->alt_ah_attr.static_rate,
&mqpcb->max_static_rate_al)) {
ret = -EINVAL;
goto modify_qp_exit2;
}
/* OpenIB doesn't support alternate retry counts - copy them */
mqpcb->retry_count_al = mqpcb->retry_count;
mqpcb->rnr_retry_count_al = mqpcb->rnr_retry_count;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_ALT_PHYS_PORT, 1)
| EHCA_BMASK_SET(MQPCB_MASK_ALT_P_KEY_IDX, 1)
| EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT_AL, 1);
/*
* Always supply the GRH flag, even if it's zero, to give the
* hypervisor a clear "yes" or "no" instead of a "perhaps"
*/
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
/*
* only if GRH is TRUE we might consider SOURCE_GID_IDX
* and DEST_GID otherwise phype will return H_ATTR_PARM!!!
*/
if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
mqpcb->send_grh_flag_al = 1;
for (cnt = 0; cnt < 16; cnt++)
mqpcb->dest_gid_al.byte[cnt] =
attr->alt_ah_attr.grh.dgid.raw[cnt];
mqpcb->source_gid_idx_al =
attr->alt_ah_attr.grh.sgid_index;
mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
mqpcb->traffic_class_al =
attr->alt_ah_attr.grh.traffic_class;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1)
| EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1) |
EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
}
}
if (attr_mask & IB_QP_MIN_RNR_TIMER) {
mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
}
if (attr_mask & IB_QP_SQ_PSN) {
mqpcb->send_psn = attr->sq_psn;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
}
if (attr_mask & IB_QP_DEST_QPN) {
mqpcb->dest_qp_nr = attr->dest_qp_num;
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
}
if (attr_mask & IB_QP_PATH_MIG_STATE) {
if (attr->path_mig_state != IB_MIG_REARM
&& attr->path_mig_state != IB_MIG_MIGRATED) {
ret = -EINVAL;
ehca_err(ibqp->device, "Invalid mig_state=%x",
attr->path_mig_state);
goto modify_qp_exit2;
}
mqpcb->path_migration_state = attr->path_mig_state + 1;
if (attr->path_mig_state == IB_MIG_REARM)
my_qp->mig_armed = 1;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
}
if (attr_mask & IB_QP_CAP) {
mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
/* no support for max_send/recv_sge yet */
}
if (ehca_debug_level >= 2)
ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
update_mask,
mqpcb, my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ret = ehca2ib_return_code(h_ret);
ehca_err(ibqp->device, "hipz_h_modify_qp() failed h_ret=%lli "
"ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
goto modify_qp_exit2;
}
if ((my_qp->qp_type == IB_QPT_UD ||
my_qp->qp_type == IB_QPT_GSI ||
my_qp->qp_type == IB_QPT_SMI) &&
statetrans == IB_QPST_SQE2RTS) {
/* doorbell to reprocessing wqes */
iosync(); /* serialize GAL register access */
hipz_update_sqa(my_qp, bad_wqe_cnt-1);
ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
}
if (statetrans == IB_QPST_RESET2INIT ||
statetrans == IB_QPST_INIT2INIT) {
mqpcb->qp_enable = 1;
mqpcb->qp_state = EHCA_QPS_INIT;
update_mask = 0;
update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
update_mask,
mqpcb,
my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ret = ehca2ib_return_code(h_ret);
ehca_err(ibqp->device, "ENABLE in context of "
"RESET_2_INIT failed! Maybe you didn't get "
"a LID h_ret=%lli ehca_qp=%p qp_num=%x",
h_ret, my_qp, ibqp->qp_num);
goto modify_qp_exit2;
}
}
if ((qp_new_state == IB_QPS_ERR) && (qp_cur_state != IB_QPS_ERR)
&& !is_user) {
ret = check_for_left_cqes(my_qp, shca);
if (ret)
goto modify_qp_exit2;
}
if (statetrans == IB_QPST_ANY2RESET) {
ipz_qeit_reset(&my_qp->ipz_rqueue);
ipz_qeit_reset(&my_qp->ipz_squeue);
if (qp_cur_state == IB_QPS_ERR && !is_user) {
del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
if (HAS_RQ(my_qp))
del_from_err_list(my_qp->recv_cq,
&my_qp->rq_err_node);
}
if (!is_user)
reset_queue_map(&my_qp->sq_map);
if (HAS_RQ(my_qp) && !is_user)
reset_queue_map(&my_qp->rq_map);
}
if (attr_mask & IB_QP_QKEY)
my_qp->qkey = attr->qkey;
modify_qp_exit2:
if (squeue_locked) { /* this means: sqe -> rts */
spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
my_qp->sqerr_purgeflag = 1;
}
modify_qp_exit1:
ehca_free_fw_ctrlblock(mqpcb);
return ret;
}
int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
struct ib_udata *udata)
{
int ret = 0;
struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
ib_device);
struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
/* The if-block below caches qp_attr to be modified for GSI and SMI
* qps during the initialization by ib_mad. When the respective port
* is activated, ie we got an event PORT_ACTIVE, we'll replay the
* cached modify calls sequence, see ehca_recover_sqs() below.
* Why that is required:
* 1) If one port is connected, older code requires that port one
* to be connected and module option nr_ports=1 to be given by
* user, which is very inconvenient for end user.
* 2) Firmware accepts modify_qp() only if respective port has become
* active. Older code had a wait loop of 30sec create_qp()/
* define_aqp1(), which is not appropriate in practice. This
* code now removes that wait loop, see define_aqp1(), and always
* reports all ports to ib_mad resp. users. Only activated ports
* will then usable for the users.
*/
if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
int port = my_qp->init_attr.port_num;
struct ehca_sport *sport = &shca->sport[port - 1];
unsigned long flags;
spin_lock_irqsave(&sport->mod_sqp_lock, flags);
/* cache qp_attr only during init */
if (my_qp->mod_qp_parm) {
struct ehca_mod_qp_parm *p;
if (my_qp->mod_qp_parm_idx >= EHCA_MOD_QP_PARM_MAX) {
ehca_err(&shca->ib_device,
"mod_qp_parm overflow state=%x port=%x"
" type=%x", attr->qp_state,
my_qp->init_attr.port_num,
ibqp->qp_type);
spin_unlock_irqrestore(&sport->mod_sqp_lock,
flags);
return -EINVAL;
}
p = &my_qp->mod_qp_parm[my_qp->mod_qp_parm_idx];
p->mask = attr_mask;
p->attr = *attr;
my_qp->mod_qp_parm_idx++;
ehca_dbg(&shca->ib_device,
"Saved qp_attr for state=%x port=%x type=%x",
attr->qp_state, my_qp->init_attr.port_num,
ibqp->qp_type);
spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
goto out;
}
spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
}
ret = internal_modify_qp(ibqp, attr, attr_mask, 0);
out:
if ((ret == 0) && (attr_mask & IB_QP_STATE))
my_qp->state = attr->qp_state;
return ret;
}
void ehca_recover_sqp(struct ib_qp *sqp)
{
struct ehca_qp *my_sqp = container_of(sqp, struct ehca_qp, ib_qp);
int port = my_sqp->init_attr.port_num;
struct ib_qp_attr attr;
struct ehca_mod_qp_parm *qp_parm;
int i, qp_parm_idx, ret;
unsigned long flags, wr_cnt;
if (!my_sqp->mod_qp_parm)
return;
ehca_dbg(sqp->device, "SQP port=%x qp_num=%x", port, sqp->qp_num);
qp_parm = my_sqp->mod_qp_parm;
qp_parm_idx = my_sqp->mod_qp_parm_idx;
for (i = 0; i < qp_parm_idx; i++) {
attr = qp_parm[i].attr;
ret = internal_modify_qp(sqp, &attr, qp_parm[i].mask, 0);
if (ret) {
ehca_err(sqp->device, "Could not modify SQP port=%x "
"qp_num=%x ret=%x", port, sqp->qp_num, ret);
goto free_qp_parm;
}
ehca_dbg(sqp->device, "SQP port=%x qp_num=%x in state=%x",
port, sqp->qp_num, attr.qp_state);
}
/* re-trigger posted recv wrs */
wr_cnt = my_sqp->ipz_rqueue.current_q_offset /
my_sqp->ipz_rqueue.qe_size;
if (wr_cnt) {
spin_lock_irqsave(&my_sqp->spinlock_r, flags);
hipz_update_rqa(my_sqp, wr_cnt);
spin_unlock_irqrestore(&my_sqp->spinlock_r, flags);
ehca_dbg(sqp->device, "doorbell port=%x qp_num=%x wr_cnt=%lx",
port, sqp->qp_num, wr_cnt);
}
free_qp_parm:
kfree(qp_parm);
/* this prevents subsequent calls to modify_qp() to cache qp_attr */
my_sqp->mod_qp_parm = NULL;
}
int ehca_query_qp(struct ib_qp *qp,
struct ib_qp_attr *qp_attr,
int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
{
struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
ib_device);
struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
struct hcp_modify_qp_control_block *qpcb;
int cnt, ret = 0;
u64 h_ret;
if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
ehca_err(qp->device, "Invalid attribute mask "
"ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
my_qp, qp->qp_num, qp_attr_mask);
return -EINVAL;
}
qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
if (!qpcb) {
ehca_err(qp->device, "Out of memory for qpcb "
"ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
return -ENOMEM;
}
h_ret = hipz_h_query_qp(adapter_handle,
my_qp->ipz_qp_handle,
&my_qp->pf,
qpcb, my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ret = ehca2ib_return_code(h_ret);
ehca_err(qp->device, "hipz_h_query_qp() failed "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, qp->qp_num, h_ret);
goto query_qp_exit1;
}
qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
qp_attr->qp_state = qp_attr->cur_qp_state;
if (qp_attr->cur_qp_state == -EINVAL) {
ret = -EINVAL;
ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
"ehca_qp=%p qp_num=%x",
qpcb->qp_state, my_qp, qp->qp_num);
goto query_qp_exit1;
}
if (qp_attr->qp_state == IB_QPS_SQD)
qp_attr->sq_draining = 1;
qp_attr->qkey = qpcb->qkey;
qp_attr->path_mtu = qpcb->path_mtu;
qp_attr->path_mig_state = qpcb->path_migration_state - 1;
qp_attr->rq_psn = qpcb->receive_psn;
qp_attr->sq_psn = qpcb->send_psn;
qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
/* UD_AV CIRCUMVENTION */
if (my_qp->qp_type == IB_QPT_UD) {
qp_attr->cap.max_send_sge =
qpcb->actual_nr_sges_in_sq_wqe - 2;
qp_attr->cap.max_recv_sge =
qpcb->actual_nr_sges_in_rq_wqe - 2;
} else {
qp_attr->cap.max_send_sge =
qpcb->actual_nr_sges_in_sq_wqe;
qp_attr->cap.max_recv_sge =
qpcb->actual_nr_sges_in_rq_wqe;
}
qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
qp_attr->dest_qp_num = qpcb->dest_qp_nr;
qp_attr->pkey_index = qpcb->prim_p_key_idx;
qp_attr->port_num = qpcb->prim_phys_port;
qp_attr->timeout = qpcb->timeout;
qp_attr->retry_cnt = qpcb->retry_count;
qp_attr->rnr_retry = qpcb->rnr_retry_count;
qp_attr->alt_pkey_index = qpcb->alt_p_key_idx;
qp_attr->alt_port_num = qpcb->alt_phys_port;
qp_attr->alt_timeout = qpcb->timeout_al;
qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
/* primary av */
qp_attr->ah_attr.sl = qpcb->service_level;
if (qpcb->send_grh_flag) {
qp_attr->ah_attr.ah_flags = IB_AH_GRH;
}
qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
qp_attr->ah_attr.dlid = qpcb->dlid;
qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
qp_attr->ah_attr.port_num = qp_attr->port_num;
/* primary GRH */
qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
for (cnt = 0; cnt < 16; cnt++)
qp_attr->ah_attr.grh.dgid.raw[cnt] =
qpcb->dest_gid.byte[cnt];
/* alternate AV */
qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
if (qpcb->send_grh_flag_al) {
qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
}
qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
/* alternate GRH */
qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
for (cnt = 0; cnt < 16; cnt++)
qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
qpcb->dest_gid_al.byte[cnt];
/* return init attributes given in ehca_create_qp */
if (qp_init_attr)
*qp_init_attr = my_qp->init_attr;
if (ehca_debug_level >= 2)
ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
query_qp_exit1:
ehca_free_fw_ctrlblock(qpcb);
return ret;
}
int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
{
struct ehca_qp *my_qp =
container_of(ibsrq, struct ehca_qp, ib_srq);
struct ehca_shca *shca =
container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
struct hcp_modify_qp_control_block *mqpcb;
u64 update_mask;
u64 h_ret;
int ret = 0;
mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
if (!mqpcb) {
ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
"ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
return -ENOMEM;
}
update_mask = 0;
if (attr_mask & IB_SRQ_LIMIT) {
attr_mask &= ~IB_SRQ_LIMIT;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
| EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
mqpcb->curr_srq_limit = attr->srq_limit;
mqpcb->qp_aff_asyn_ev_log_reg =
EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
}
/* by now, all bits in attr_mask should have been cleared */
if (attr_mask) {
ehca_err(ibsrq->device, "invalid attribute mask bits set "
"attr_mask=%x", attr_mask);
ret = -EINVAL;
goto modify_srq_exit0;
}
if (ehca_debug_level >= 2)
ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
NULL, update_mask, mqpcb,
my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ret = ehca2ib_return_code(h_ret);
ehca_err(ibsrq->device, "hipz_h_modify_qp() failed h_ret=%lli "
"ehca_qp=%p qp_num=%x",
h_ret, my_qp, my_qp->real_qp_num);
}
modify_srq_exit0:
ehca_free_fw_ctrlblock(mqpcb);
return ret;
}
int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
{
struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
ib_device);
struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
struct hcp_modify_qp_control_block *qpcb;
int ret = 0;
u64 h_ret;
qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
if (!qpcb) {
ehca_err(srq->device, "Out of memory for qpcb "
"ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
return -ENOMEM;
}
h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
NULL, qpcb, my_qp->galpas.kernel);
if (h_ret != H_SUCCESS) {
ret = ehca2ib_return_code(h_ret);
ehca_err(srq->device, "hipz_h_query_qp() failed "
"ehca_qp=%p qp_num=%x h_ret=%lli",
my_qp, my_qp->real_qp_num, h_ret);
goto query_srq_exit1;
}
srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
srq_attr->max_sge = 3;
srq_attr->srq_limit = qpcb->curr_srq_limit;
if (ehca_debug_level >= 2)
ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
query_srq_exit1:
ehca_free_fw_ctrlblock(qpcb);
return ret;
}
static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
struct ib_uobject *uobject)
{
struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
ib_pd);
struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
u32 qp_num = my_qp->real_qp_num;
int ret;
u64 h_ret;
u8 port_num;
int is_user = 0;
enum ib_qp_type qp_type;
unsigned long flags;
if (uobject) {
is_user = 1;
if (my_qp->mm_count_galpa ||
my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
ehca_err(dev, "Resources still referenced in "
"user space qp_num=%x", qp_num);
return -EINVAL;
}
}
if (my_qp->send_cq) {
ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
if (ret) {
ehca_err(dev, "Couldn't unassign qp from "
"send_cq ret=%i qp_num=%x cq_num=%x", ret,
qp_num, my_qp->send_cq->cq_number);
return ret;
}
}
write_lock_irqsave(&ehca_qp_idr_lock, flags);
idr_remove(&ehca_qp_idr, my_qp->token);
write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
/*
* SRQs will never get into an error list and do not have a recv_cq,
* so we need to skip them here.
*/
if (HAS_RQ(my_qp) && !IS_SRQ(my_qp) && !is_user)
del_from_err_list(my_qp->recv_cq, &my_qp->rq_err_node);
if (HAS_SQ(my_qp) && !is_user)
del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
/* now wait until all pending events have completed */
wait_event(my_qp->wait_completion, !atomic_read(&my_qp->nr_events));
h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
if (h_ret != H_SUCCESS) {
ehca_err(dev, "hipz_h_destroy_qp() failed h_ret=%lli "
"ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
return ehca2ib_return_code(h_ret);
}
port_num = my_qp->init_attr.port_num;
qp_type = my_qp->init_attr.qp_type;
if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
spin_lock_irqsave(&sport->mod_sqp_lock, flags);
kfree(my_qp->mod_qp_parm);
my_qp->mod_qp_parm = NULL;
shca->sport[port_num - 1].ibqp_sqp[qp_type] = NULL;
spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
}
/* no support for IB_QPT_SMI yet */
if (qp_type == IB_QPT_GSI) {
struct ib_event event;
ehca_info(dev, "device %s: port %x is inactive.",
shca->ib_device.name, port_num);
event.device = &shca->ib_device;
event.event = IB_EVENT_PORT_ERR;
event.element.port_num = port_num;
shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
ib_dispatch_event(&event);
}
if (HAS_RQ(my_qp)) {
ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
if (!is_user)
vfree(my_qp->rq_map.map);
}
if (HAS_SQ(my_qp)) {
ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
if (!is_user)
vfree(my_qp->sq_map.map);
}
kmem_cache_free(qp_cache, my_qp);
atomic_dec(&shca->num_qps);
return 0;
}
int ehca_destroy_qp(struct ib_qp *qp)
{
return internal_destroy_qp(qp->device,
container_of(qp, struct ehca_qp, ib_qp),
qp->uobject);
}
int ehca_destroy_srq(struct ib_srq *srq)
{
return internal_destroy_qp(srq->device,
container_of(srq, struct ehca_qp, ib_srq),
srq->uobject);
}
int ehca_init_qp_cache(void)
{
qp_cache = kmem_cache_create("ehca_cache_qp",
sizeof(struct ehca_qp), 0,
SLAB_HWCACHE_ALIGN,
NULL);
if (!qp_cache)
return -ENOMEM;
return 0;
}
void ehca_cleanup_qp_cache(void)
{
if (qp_cache)
kmem_cache_destroy(qp_cache);
}